Fix iterators
Fix iterators

tkerola/chainer,wkentaro/chainer,niboshi/chainer,jnishi/chainer,cupy/cupy,kikusu/chainer,okuta/chainer,ktnyt/chainer,cupy/cupy,hvy/chainer,niboshi/chainer,wkentaro/chainer,hvy/chainer,okuta/chainer,keisuke-umezawa/chainer,jnishi/chainer,ktnyt/chainer,keisuke-umezawa/chainer,aonotas/chainer,chainer/chainer,pfnet/chainer,hvy/chainer,ktnyt/chainer,kiyukuta/chainer,keisuke-umezawa/chainer,wkentaro/chainer,ysekky/chainer,okuta/chainer,kashif/chainer,niboshi/chainer,cupy/cupy,jnishi/chainer,keisuke-umezawa/chainer,chainer/chainer,jnishi/chainer,hvy/chainer,ronekko/chainer,cupy/cupy,anaruse/chainer,chainer/chainer,niboshi/chainer,okuta/chainer,kikusu/chainer,delta2323/chainer,rezoo/chainer,ktnyt/chainer,chainer/chainer,wkentaro/chainer